-LRB- CNN -RRB- -- Super Bowl fans in Tucson , Arizona , caught a different kind of show during Sunday 's big game .

Just as Cardinals ' superstar Larry Fitzgerald watched himself sprint into the end zone on the stadium 's Jumbotron during Sunday 's Super Bowl , 10 seconds of eye-popping pornographic imagery `` flashed '' across the screens of those watching at home .

`` We are mortified by last evening 's Super Bowl interruption , and deeply apologize to our customers for the inappropriate programming , '' Comcast Cable said in a written statement .

`` Our initial investigation suggests this was an isolated malicious act , '' the statement added .

Comcast , and several local television stations that carried the signal , say they are currently investigating what caused the interruption .

`` It appears this material was only viewed by some Comcast customers , '' local Tucson television station KVOA-TV said in a written statement .

Television station KVOA added `` when the NBC feed of the Super Bowl was transmitted from KVOA to local cable providers and through over-the-air antennas , there was no pornographic material , '' KVOA President and General Manager Gary Nielsen said in a separate statement .

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Tucson , Arizona , viewers see 10 seconds of porn during Super Bowl

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Snippet apparently seen by viewers with cable

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Comcast Cable and local stations looking into the interruption